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vitamin A2

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noun
  1. a yellow oil, C20H28O, similar to vitamin A, obtained from fish liver.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for vitamin a2

vitamin A2

noun
  1. a vitamin that occurs in the tissues of freshwater fish and has a function similar to that of vitamin A. Formula: C 20 H 28 OAlso called: dehydroretinol
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

vitamin a2 in Medicine

vitamin A2

n.
  1. A golden yellow oil occurring chiefly in the livers of freshwater fish and having about 40 percent of the biological activity of vitamin A1.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.